Home / 87,611.40-131,417.10-86,689.80

Finding the Fourth Proportional to 87,611.40, 131,417.10 and 86,689.80

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Solution

The fourth proportional to 87,611.40, 131,417.10 and 86,689.80 is: 130,034.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,611.40 : 131,417.10 = 86,689.80 : x
  2. Step 2: Convert to fraction form
    87,611.40/131,417.10 = 86,689.80/x
  3. Step 3: Cross multiply
    87,611.40x = 131,417.10 × 86,689.80
  4. Step 4: Simplify right side
    87,611.40x = 11,392,522,115.58
  5. Step 5: Solve for x
    x = 11,392,522,115.58/87,611.40
  6. Step 6: Final answer
    x = 130,034.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.